Protected blade



Sept. 17, 1935.

MuRos PROTECTED BLADE F iled Feb. 28, 1954 vlwvewffor Patented Se t. 1.7,- 1935.

PATENT OFFICE PROTECTED BLADE Joseph Muros, Belmont, Masa,

lette. SaYety Razor Company, Bosto corporation of Delaware 'assignor to Giln, Masa, a

Application February 28, 1934, Serial No. 713,273 3 Claims. ((1217-46) This invention relates to the packaging of safety razor blades for distribution, sale and use, and consists in a blade protected in a novel manner against becoming dulled or rusted up to the time it is actually presented to the razor by the user.

- In my prior application, Serial No.. 709,717, filed February 5, 1934, I have disclosed a novel protected blade and blade package. In one aspect the present invention is an improvement upon the construction therein disclosed. In another aspect it consists in improvements of gen-f eral utility in the protection'of blades and is applicable to any thin steel blade either single or double-edged. The present blade, like that of my prior application, is designed to be inserted by the user in his razor before its cutting edge is exposed for shaving, that is to say, the protected blade may be actually positioned upon the projecting blade-locating studs of the razor and its protective cover then removed while the blade is held against displacement in its shaving position, so that there is no danger of its cutting edge being dulled by being brought into contact with its wrapping or any part of the razor.

In accordance with the present invention I propose to maintain the blade in position between co-operating cover sheets by spots of adhesive material which unite the cover sheet independently of the blade or substantially independently of the blade. Where the blade itself is provided with. corner recesses the adhesive spots may be located within the area of such recesses and they are thus eifective to prevent displacement of the blade either transversely or longitudinally ,between its covers. many case the surface of the blade will be free or substantially freeof adhesive material and thus the friction between the blade and its cover sheet is substantially reduced, so that the latter may be stripped from the blade without danger of tearing.

Preferably andas herein shown the adhesive material may be vaseline or the like which is applied hot and then allowed to cool and so form a temporary bond between the two coverv sheets of the blade. By locating the two inner 'spots opposite the end of the blade min the corner recesses thereof it becomes necessary in the stripping operation to destroy only two adhesive spots located'at the outer end of the blade. Thus the stripping operation is made easy and there ls no tendency to displace the protected blade onto tear its cover when it is being strippedi The convenience of the user is thereby served without in any way sacrificing the full protective flmctions of the cover. These and other features of the invention will be best understood and appreciated from the r following description of a preferred embodiment thereof, selected for purposes of illustration and shown in the accompanying drawing, in which,-

Figl 1 isa view in perspective of several protected blades assembled in the form of a package, showing its outer cover in raised position;

. Fig. 2 is a view in perspective of a safety razor with a protected blade positioned therein and partially stripped; and

Fig. 3 is a view in perspective on an enlarged scale of a single protected blade with portions. of

one cover sheet broken away.

It will be understood that my invention is in no sense limited in its use to any specific type of safety razor blade, and that the particular blade 20 herein shown represents merely one razor blade of well-known commercial type. The blade is of thin flexible steel, sharpened at both edges for cutting and having re-entrant corner recesses defining an elongated centrally disposed unsharpened'portion in each end of the blade. The blade is internally apertured, being provided with a long slot 32 having spaced enlargements of characteristic outline in its length and being designed to register with and fit upon the bladelocating projections of the razor in which it is 30 to be used.

' As shown in Fig. 3 the cover is formed by folding a continuous strip on the fold vertex line l2, the free edges, being brought into registering and overlapping relation. However the cover sheets may be formed, they are provided with registering longitudinal slots'll which coincide in location with the blade aperture 32, so as to render this opening'fnlly available to be matched with the blade-locating studs of the safety razor.

As bestshown in Fig. 3 the two cover sheets II are united at fourspotsby adhesive mate-- rial l, the spots being represented in this figure,

for the sake of clearness, with some exaggeration of thickness. In this case the spots are located substantially within the area of the reentrant recesses in the corners of the blade and. while it is desirable to keep the surface of the blade itself free from the adhesive 16, there is no serious objection to having the edges of the recess slightly overlap. In any case, however, a firm connection is formed by each of the spots and these are so located with respect to the body of the blade that it is positively prevented from being displaced either longitudinally or transversely without destroying at least one of the spots I6.

In making up a package a plurality of protected blades may be piled up and the ends of their protective covers connected by a staple or otherwise. As shown in Fig, 1 six protected blades are assembled between pasteboard covers 20 and bound together by a wire staple 24. The covers 20 are preferably folded from a single strip or sheet and provided near their outer fold vertex with a perforated line whereby the vertex portion 22 of the covers may be torn off to unseal the package.

Each individual cover sheet If) is provided with a transverse perforated line l8 by which it may be conveniently-torn off leaving a stub of the cover in the binding. I The perforated lines l8 are so located as to intersect the inner end of the slot M in the cover strip. The result is that when any protected blade is torn out from the package the slot H is opened through one end of thecover' and this takes place of course without in any way disturbing the connection between the two covers formed by the adhesive spots I6.

Fig. 2 illustrates the step of preparing the pro tected blade for shaving. The safety razor therein shown may comprise a guard member 36 having co-operating cap section members 38 pivotally mounted thereon and an elongated blade locating rib 40 which projects above the surface of the guard member 36. The handle 34 of the razor is rigidly connected to the guard member 36.

It will be seen that the user may position a protected blade in the open safety razor with the slot ll of the cover and the aperture 32 of the blade fitting upon the rib 40 or upon projecting studs of any other configuration which fit the blade aperture. In this movement of presentation the longitudinal edges of the cover sheets H! are particularly effective in holding the cutting edges of the blade away from the upstanding cap sections so that they may not be dulled by contact therewith. Having thus located the protected blade without in any way disturbing its cover the user may now grasp one end of the cover, as for example the folded end including the vertex line I2, and may pull the 5 cover endwise and longitudinally from the blade while the latter is thus held. It will be seen that two of the adhesive spots IS are immediately moved away from the inner or right hand end of the blade, whereas, the other end of the blade 1 is effective to shear or otherwise break the connection formed by the two outer adhesive spots l6 between the outer ends of the cover sheets. This, as already pointed out, may be very readily effected by slight pressure and thereupon the cover may be stripped entirely from the blade, not in any way disturbing its cutting edges and leaving it in active position for shaving.

Having thus described my invention what I claim as new and desire to secure by Letters Patent of the United States is:-

l. A protected blade adapted to be presented to a safety razor with its full protection, said blade having corner recesses, and a cover sheet disposed upon each face thereof which extends beyond its cutting edge, the blade being maintained in position by separate spots of adhesive material located in the corner recesses of the blade and uniting the covers in defined areas only independently of the blade and leaving the blade surface substantially free of adhesive.

2. A protected internally apertured blade, and cover sheets larger in dimensions than the blade disposed on both surfaces thereof, the cover sheets being longitudinally slotted in approximate registration with the aperture of the blade and having a scored line for tearing which extends transversely into the slot, and adhesive connections of definitely limited area between the sheets upon opposite sides of the slot, so disposed as to remain intact when the cover sheets are torn on said scored line.

3. A protected internally apertured blade recessed at its corners and having cover sheets larger in dimensions than the blade disposed on both surfaces thereof and longitudinally slotted to correspond in general with the blade aperture, each of the cover sheets being weakened in lines which intersect the slots therein and separate definite spots of adhesive material con- 5 necting the cover sheets and contacting with the edges of the corner recesses of the blade while leaving its surfaces substantially free.

JOSEPH MUROS. 

